train.lab

MSTParser是以最大生成树理论为基础的判别式依存句法分析器。它将一科依存树的得分看作是 所有依存关系的得分的总和

DT	VBZ	IN	DT	NN	NN	,	DT	NN	,	CC	DT	NN	,	DT	NN	,	VBP	DT	NN	RB	IN	DT	NN	NN	.
NP-SBJ	ROOT	SBAR	DEP	DEP	NP	DEP	DEP	NP	DEP	DEP	DEP	NP	DEP	DEP	NP-SBJ	DEP	S	DEP	NP	ADVP	PP	DEP	DEP	NP	DEP
2	0	2	6	6	9	9	9	16	9	16	13	16	16	16	18	16	3	20	21	18	18	25	25	22	2

in	a	labor-intensive	process	,	the	seed	companies	cut	off	the	tassels	of	each	plant	,	making	it	male	sterile	.
IN	DT	JJ	NN	,	DT	NN	NNS	VBD	RP	DT	NNS	IN	DT	NN	,	VBG	PRP	JJ	JJ	.
PP	DEP	DEP	NP	DEP	DEP	DEP	NP-SBJ	ROOT	PRT	DEP	NP-OBJ	PP	DEP	NP	DEP	S	NP-SBJ	DEP	S	DEP
9	4	4	1	9	8	8	9	0	9	12	9	12	15	13	9	9	20	20	17	9

they	sow	a	row	of	male-fertile	plants	nearby	,	which	then	pollinate	the	male-sterile	plants	.
PRP	VBP	DT	NN	IN	JJ	NNS	RB	,	WDT	RB	VBP	DT	JJ	NNS	.
NP-SBJ	ROOT	DEP	NP-OBJ	PP	DEP	NP	ADVP	DEP	SBAR	ADVP	S	DEP	DEP	NP-OBJ	DEP
2	0	4	2	4	7	5	2	2	2	12	10	15	15	12	2

the	first	hybrid	corn	seeds	produced	using	this	mechanical	approach	were	introduced	in	the	1930s	and	they	yielded	as	much	as	20	%	more	corn	than	naturally	pollinated	plants	.
DT	JJ	JJ	NN	NNS	VBN	VBG	DT	JJ	NN	VBD	VBN	IN	DT	NNS	CC	PRP	VBD	RB	JJ	IN	CD	NN	JJR	NN	IN	RB	VBN	NNS	.
DEP	DEP	DEP	DEP	NP-SBJ	VP	S	DEP	DEP	NP-OBJ	S	VP	PP	DEP	NP	DEP	NP-SBJ	ROOT	DEP	DEP	QP	DEP	NP	ADJP	NP-OBJ	PP	DEP	ADJP	NP	DEP
5	5	5	5	11	5	6	10	10	7	18	11	12	15	13	18	18	0	21	21	23	21	24	25	18	25	28	29	26	18

the	vast	majority	of	the	u.s.	corn	crop	now	is	grown	from	hybrid	seeds	produced	by	seed	companies	.
DT	JJ	NN	IN	DT	NNP	NN	NN	RB	VBZ	VBN	IN	JJ	NNS	VBN	IN	NN	NNS	.
DEP	DEP	NP-SBJ	PP	DEP	DEP	DEP	NP	ADVP	ROOT	VP	PP	DEP	NP	VP	PP	DEP	NP	DEP
3	3	10	3	8	8	8	4	10	0	10	11	14	12	14	15	18	16	10

a	similar	technique	is	almost	impossible	to	apply	to	other	crops	,	such	as	cotton	,	soybeans	and	rice	.
DT	JJ	NN	VBZ	RB	JJ	TO	VB	TO	JJ	NNS	,	JJ	IN	NN	,	NNS	CC	NN	.
DEP	DEP	NP-SBJ	ROOT	DEP	ADJP	DEP	SBAR	PP	DEP	NP	DEP	DEP	PP	DEP	DEP	DEP	DEP	NP	DEP
3	3	4	0	6	4	8	6	8	11	9	11	14	11	19	19	19	19	14	4

the	male	part	,	the	anthers	of	the	plant	,	and	the	female	,	the	pistils	,	of	the	same	plant	are	within	a	fraction	of	an	inch	or	even	attached	to	each	other	.
DT	JJ	NN	,	DT	NNS	IN	DT	NN	,	CC	DT	NN	,	DT	NNS	,	IN	DT	JJ	NN	VBP	IN	DT	NN	IN	DT	NN	CC	RB	VBN	TO	DT	JJ	.
DEP	DEP	NP	DEP	DEP	NP	PP	DEP	NP	DEP	DEP	DEP	NP	DEP	DEP	NP-SBJ	DEP	PP	DEP	DEP	NP	ROOT	UCP	DEP	NP	PP	DEP	NP	DEP	ADVP	VP	PP	DEP	NP	DEP
3	3	6	6	6	16	6	9	7	16	16	13	16	16	16	22	16	16	21	21	18	0	22	25	23	25	28	26	23	23	23	31	34	32	22

the	anthers	in	these	plants	are	difficult	to	clip	off	.
DT	NNS	IN	DT	NNS	VBP	JJ	TO	VB	RP	.
DEP	NP-SBJ	PP	DEP	NP	ROOT	ADJP	DEP	SBAR	PRT	DEP
2	6	2	5	3	0	6	9	7	9	6

in	china	,	a	great	number	of	workers	are	engaged	in	pulling	out	the	male	organs	of	rice	plants	using	tweezers	,	and	one-third	of	rice	produced	in	that	country	is	grown	from	hybrid	seeds	.
IN	NNP	,	DT	JJ	NN	IN	NNS	VBP	VBN	IN	VBG	RP	DT	JJ	NNS	IN	NN	NNS	VBG	NNS	,	CC	NN	IN	NN	VBN	IN	DT	NN	VBZ	VBN	IN	JJ	NNS	.
PP	NP	DEP	DEP	DEP	NP-SBJ	PP	NP	S	VP	PP	S	PRT	DEP	DEP	NP-OBJ	PP	DEP	NP	S	NP-OBJ	DEP	DEP	NP-SBJ	PP	NP	VP	PP	DEP	NP	ROOT	VP	PP	DEP	NP	DEP
9	1	9	6	6	9	6	7	31	9	10	11	12	16	16	12	16	19	17	12	20	31	31	31	24	25	26	27	30	28	0	31	32	35	33	31

at	plant	genetic	systems	,	researchers	have	isolated	a	pollen-inhibiting	gene	that	can	be	inserted	in	a	plant	to	confer	male	sterility	.
IN	NNP	NNP	NNPS	,	NNS	VBP	VBN	DT	JJ	NN	WDT	MD	VB	VBN	IN	DT	NN	TO	VB	JJ	NN	.
PP	DEP	DEP	NP	DEP	NP-SBJ	ROOT	VP	DEP	DEP	NP-OBJ	SBAR	S	VP	VP	PP	DEP	NP	DEP	S	DEP	NP-OBJ	DEP
7	4	4	1	7	7	0	7	11	11	8	11	12	13	14	15	18	16	20	15	22	20	7

jan	leemans	,	research	director	,	said	this	gene	was	successfully	introduced	in	oil-producing	rapeseed	plants	,	a	major	crop	in	europe	and	canada	,	using	as	a	carrier	a	``	promoter	gene	''	developed	by	robert	goldberg	at	the	university	of	california	in	los	angeles	.
NNP	NNP	,	NN	NN	,	VBD	DT	NN	VBD	RB	VBN	IN	JJ	NN	NNS	,	DT	JJ	NN	IN	NNP	CC	NNP	,	VBG	IN	DT	NN	DT	``	NN	NN	''	VBN	IN	NNP	NNP	IN	DT	NNP	IN	NNP	IN	NNP	NNP	.
DEP	NP	DEP	DEP	NP-SBJ	DEP	ROOT	DEP	NP-SBJ	SBAR	ADVP	VP	PP	DEP	DEP	NP	DEP	DEP	DEP	NP	PP	DEP	DEP	NP	DEP	S	PP	DEP	NP	DEP	DEP	DEP	NP-OBJ	DEP	VP	PP	DEP	NP	PP	DEP	NP	PP	NP	PP	DEP	NP	DEP
2	5	5	5	7	5	0	9	10	7	12	10	12	16	16	20	20	20	20	13	20	24	24	21	12	12	26	29	27	33	33	33	26	33	33	35	38	36	35	41	39	41	42	41	46	44	7

the	sterilizing	gene	is	expressed	just	before	the	pollen	is	about	to	develop	and	it	deactivates	the	anthers	of	every	flower	in	the	plant	.
DT	VBG	NN	VBZ	VBN	RB	IN	DT	NN	VBZ	IN	TO	VB	CC	PRP	VBZ	DT	NNS	IN	DT	NN	IN	DT	NN	.
DEP	DEP	NP-SBJ	S	VP	ADVP	SBAR	DEP	NP-SBJ	S	DEP	DEP	ADJP	DEP	NP-SBJ	ROOT	DEP	NP-OBJ	PP	DEP	NP	PP	DEP	NP	DEP
3	3	4	16	4	7	5	9	10	7	13	13	10	16	16	0	18	16	18	21	19	21	24	22	16

mr.	leemans	said	this	genetic	manipulation	does	n't	hurt	the	growth	of	that	plant	.
NNP	NNP	VBD	DT	JJ	NN	VBZ	RB	VB	DT	NN	IN	DT	NN	.
DEP	NP-SBJ	ROOT	DEP	DEP	NP-SBJ	SBAR	DEP	VP	DEP	NP-OBJ	PP	DEP	NP	DEP
2	3	0	6	6	7	3	7	7	11	9	11	14	12	3

the	researchers	also	pulled	off	a	second	genetic	engineering	trick	in	order	to	get	male-sterile	plants	in	large	enough	numbers	to	produce	a	commercial	hybrid	seed	crop	.
DT	NNS	RB	VBD	RP	DT	JJ	JJ	NN	NN	IN	NN	TO	VB	JJ	NNS	IN	JJ	JJ	NNS	TO	VB	DT	JJ	JJ	NN	NN	.
DEP	NP-SBJ	ADVP	ROOT	PRT	DEP	DEP	DEP	DEP	NP-OBJ	SBAR	DEP	DEP	S	DEP	NP-OBJ	PP	DEP	ADJP	NP	DEP	S	DEP	DEP	DEP	DEP	NP-OBJ	DEP
2	4	4	0	4	10	10	10	10	4	4	11	14	11	16	14	14	19	20	17	22	20	27	27	27	27	22	4

they	attached	a	second	gene	,	for	herbicide	resistance	,	to	the	pollen-inhibiting	gene	.
PRP	VBD	DT	JJ	NN	,	IN	NN	NN	,	TO	DT	JJ	NN	.
NP-SBJ	ROOT	DEP	DEP	NP-OBJ	DEP	PP	DEP	NP	DEP	PP	DEP	DEP	NP	DEP
2	0	5	5	2	5	5	9	7	5	2	14	14	11	2

both	genes	are	then	inserted	into	a	few	greenhouse	plants	,	which	are	then	pollinated	and	allowed	to	mature	and	produce	seed	.
DT	NNS	VBP	RB	VBN	IN	DT	JJ	NN	NNS	,	WDT	VBP	RB	VBN	CC	VBN	TO	VB	CC	VB	NN	.
DEP	NP-SBJ	ROOT	ADVP	VP	PP	DEP	DEP	DEP	NP	DEP	SBAR	S	ADVP	VP	DEP	VP	DEP	S	DEP	VP	NP-OBJ	DEP
2	3	0	3	3	5	10	10	10	6	10	10	12	13	13	15	15	19	17	19	19	21	3

the	laws	of	heredity	dictate	that	half	of	the	plants	springing	from	these	greenhouse-produced	seeds	will	be	male	sterile	and	herbicide	resistant	and	half	will	be	male	fertile	and	herbicide	susceptible	.
DT	NNS	IN	NN	VBP	IN	NN	IN	DT	NNS	VBG	IN	DT	JJ	NNS	MD	VB	NN	JJ	CC	NN	JJ	CC	NN	MD	VB	NN	JJ	CC	NN	JJ	.
DEP	NP-SBJ	PP	NP	ROOT	SBAR	NP-SBJ	PP	DEP	NP	VP	PP	DEP	DEP	NP	S	VP	ADJP	DEP	DEP	ADJP	DEP	DEP	NP-SBJ	S	VP	ADJP	DEP	DEP	ADJP	DEP	DEP
2	5	2	3	0	5	16	7	10	8	10	11	15	15	12	25	16	21	18	21	17	21	25	25	6	25	30	27	30	26	30	5

the	application	of	herbicide	would	kill	off	the	male-fertile	plants	,	leaving	a	large	field	of	male-sterile	plants	that	can	be	cross-pollinated	to	produce	hybrid	seed	.
DT	NN	IN	NN	MD	VB	RP	DT	JJ	NNS	,	VBG	DT	JJ	NN	IN	JJ	NNS	WDT	MD	VB	VBN	TO	VB	NN	NN	.
DEP	NP-SBJ	PP	NP	ROOT	VP	PRT	DEP	DEP	NP-OBJ	DEP	S	DEP	DEP	NP-OBJ	PP	DEP	NP	SBAR	S	VP	VP	DEP	S	DEP	NP-OBJ	DEP
2	5	2	3	0	5	6	10	10	6	6	6	15	15	12	15	18	16	18	19	20	21	24	22	26	24	5

mr.	leemans	said	the	hybrid	rapeseeds	created	with	this	genetic	engineering	yield	15	%	to	30	%	more	output	than	the	commercial	strains	used	currently	.
NNP	NNP	VBD	DT	NN	NNS	VBN	IN	DT	JJ	NN	NN	CD	NN	TO	CD	NN	JJR	NN	IN	DT	JJ	NNS	VBN	RB	.
DEP	NP-SBJ	ROOT	DEP	DEP	NP-SBJ	VP	PP	DEP	DEP	NP	SBAR	DEP	DEP	DEP	DEP	NP	ADJP	NP-OBJ	PP	DEP	DEP	NP	VP	ADVP	DEP
2	3	0	6	6	12	6	7	11	11	8	3	17	17	17	17	18	19	12	19	23	23	20	23	24	3

``	this	technique	is	applicable	to	a	wide	variety	of	crops	,	''	he	said	,	and	added	that	some	modifications	may	be	necessary	to	accommodate	the	peculiarities	of	each	type	of	crop	.
``	DT	NN	VBZ	JJ	TO	DT	JJ	NN	IN	NNS	,	''	PRP	VBD	,	CC	VBD	IN	DT	NNS	MD	VB	JJ	TO	VB	DT	NNS	IN	DT	NN	IN	NN	.
DEP	DEP	NP-SBJ	S	ADJP	PP	DEP	DEP	NP	PP	NP	DEP	DEP	NP-SBJ	ROOT	DEP	DEP	VP	SBAR	DEP	NP-SBJ	S	VP	ADJP	DEP	S	DEP	NP-OBJ	PP	DEP	NP	PP	NP	DEP
15	3	4	15	4	5	9	9	6	9	10	15	15	15	0	15	15	15	18	21	22	19	22	23	26	23	28	26	28	31	29	31	32	15

he	said	the	company	is	experimenting	with	the	technique	on	alfalfa	,	and	plans	to	include	cotton	and	corn	,	among	other	crops	.
PRP	VBD	DT	NN	VBZ	VBG	IN	DT	NN	IN	NN	,	CC	VBZ	TO	VB	NN	CC	NN	,	IN	JJ	NNS	.
NP-SBJ	ROOT	DEP	NP-SBJ	SBAR	VP	PP	DEP	NP	PP	NP	DEP	DEP	VP	DEP	S	DEP	DEP	NP-OBJ	DEP	PP	DEP	NP	DEP
2	0	4	5	2	5	6	9	7	6	10	5	5	5	16	14	19	19	16	19	19	23	21	2

he	said	that	even	though	virtually	all	corn	seeds	currently	planted	are	hybrids	,	the	genetic	approach	will	obviate	the	need	for	mechanical	emasculation	of	anthers	,	which	costs	u.s.	seed	producers	about	$	70	million	annually	.
PRP	VBD	IN	RB	IN	RB	DT	NN	NNS	RB	VBN	VBP	NNS	,	DT	JJ	NN	MD	VB	DT	NN	IN	JJ	NN	IN	NNS	,	WDT	VBZ	NNP	NN	NNS	IN	$	CD	CD	RB	.
NP-SBJ	ROOT	SBAR	DEP	SBAR	DEP	ADJP	DEP	NP-SBJ	ADVP	VP	S	NP-PRD	DEP	DEP	DEP	NP-SBJ	S	VP	DEP	NP-OBJ	PP	DEP	NP	PP	NP	DEP	SBAR	S	DEP	DEP	NP-OBJ	DEP	NP-OBJ	DEP	DEP	ADVP	DEP
2	0	2	5	18	7	9	9	12	11	9	5	12	18	17	17	18	3	18	21	19	21	24	22	24	25	24	24	28	32	32	29	34	29	34	34	29	2

in	recent	years	,	demand	for	hybrid	seeds	has	spurred	research	at	a	number	of	chemical	and	biotechnology	companies	,	including	monsanto	co.	,	shell	oil	co.	and	eli	lilly	&	co	.
IN	JJ	NNS	,	NN	IN	NN	NNS	VBZ	VBN	NN	IN	DT	NN	IN	NN	CC	NN	NNS	,	VBG	NNP	NNP	,	NNP	NNP	NNP	CC	NNP	NNP	CC	NNP	.
PP	DEP	NP	DEP	NP-SBJ	PP	DEP	NP	ROOT	VP	NP-OBJ	PP	DEP	NP	PP	DEP	DEP	DEP	NP	DEP	PP	DEP	NP	DEP	DEP	DEP	NP	DEP	DEP	DEP	DEP	NP	DEP
9	3	1	9	9	5	8	6	0	9	10	10	14	12	14	19	19	19	15	19	19	23	32	32	27	27	32	32	32	32	32	21	9

one	technique	developed	by	some	of	these	companies	involves	a	chemical	spray	supposed	to	kill	only	a	plant	's	pollen	.
CD	NN	VBN	IN	DT	IN	DT	NNS	VBZ	DT	NN	NN	VBD	TO	VB	RB	DT	NN	POS	NN	.
DEP	NP-SBJ	VP	PP	NP	PP	DEP	NP	ROOT	DEP	DEP	NP-OBJ	VP	DEP	S	ADVP	DEP	DEP	NP	NP-OBJ	DEP
2	9	2	3	4	5	8	6	0	12	12	9	12	15	13	15	19	19	20	15	9

but	there	have	been	problems	with	chemical	sprays	damaging	plants	'	female	reproductive	organs	and	concern	for	the	toxicity	of	such	chemical	sprays	to	humans	,	animals	and	beneficial	insects	.
CC	EX	VBP	VBN	NNS	IN	NN	NNS	VBG	NNS	POS	JJ	JJ	NNS	CC	NN	IN	DT	NN	IN	JJ	NN	NNS	TO	NNS	,	NNS	CC	JJ	NNS	.
DEP	NP-SBJ	ROOT	VP	NP	PP	DEP	NP-SBJ	S	DEP	NP	DEP	DEP	NP-OBJ	DEP	NP-PRD	PP	DEP	NP	PP	DEP	DEP	NP	PP	NP	DEP	NP	DEP	DEP	NP	DEP
3	3	0	3	16	5	8	9	6	11	14	14	14	9	16	4	16	19	17	19	23	23	20	19	30	30	30	30	30	24	3

however	,	paul	johanson	,	monsanto	's	director	of	plant	sciences	,	said	the	company	's	chemical	spray	overcomes	these	problems	and	is	``	gentle	on	the	female	organ	.	''
RB	,	NNP	NNP	,	NNP	POS	NN	IN	NN	NNS	,	VBD	DT	NN	POS	NN	NN	VBZ	DT	NNS	CC	VBZ	``	JJ	IN	DT	JJ	NN	.	''
ADVP	DEP	DEP	NP	DEP	DEP	NP	NP-SBJ	PP	DEP	NP	DEP	ROOT	DEP	DEP	NP	DEP	NP-SBJ	SBAR	DEP	NP-OBJ	DEP	VP	DEP	ADJP	PP	DEP	DEP	NP	DEP	DEP
13	13	4	8	8	7	8	13	8	11	9	8	0	16	16	18	18	19	13	21	19	19	19	23	23	25	29	29	26	13	13

biosource	genetics	corp.	,	vacaville	,	calif.	,	is	developing	a	spray	containing	a	gene	that	spreads	from	cell	to	cell	and	interferes	with	the	genes	that	are	responsible	for	producing	pollen	.
NNP	NNP	NNP	,	NNP	,	NNP	,	VBZ	VBG	DT	NN	VBG	DT	NN	WDT	VBZ	IN	NN	TO	NN	CC	VBZ	IN	DT	NNS	WDT	VBP	JJ	IN	VBG	NN	.
DEP	DEP	NP	DEP	NP	DEP	NP-SBJ	DEP	ROOT	VP	DEP	NP-OBJ	VP	DEP	NP-OBJ	SBAR	S	PP	NP	PP	NP	DEP	VP	PP	DEP	NP	SBAR	S	ADJP	PP	S	NP-OBJ	DEP
3	3	7	7	7	7	9	7	0	9	12	10	12	15	13	15	16	17	18	17	20	17	17	23	26	24	26	27	28	29	30	31	9

this	gene	,	called	``	gametocide	,	''	is	carried	into	the	plant	by	a	virus	that	remains	active	for	a	few	days	.
DT	NN	,	VBN	``	NN	,	''	VBZ	VBN	IN	DT	NN	IN	DT	NN	WDT	VBZ	JJ	IN	DT	JJ	NNS	.
DEP	NP-SBJ	DEP	VP	DEP	S	DEP	DEP	ROOT	VP	PP	DEP	NP	PP	DEP	NP	SBAR	S	ADJP	PP	DEP	DEP	NP	DEP
2	9	2	2	6	4	2	2	0	9	10	13	11	10	16	14	16	17	18	18	23	23	20	9

robert	erwin	,	president	of	biosource	,	called	plant	genetic	's	approach	``	interesting	''	and	``	novel	,	''	and	``	complementary	rather	than	competitive	.	''
NNP	NNP	,	NN	IN	NNP	,	VBD	NNP	NNP	POS	NN	``	JJ	''	CC	``	JJ	,	''	CC	``	JJ	RB	IN	JJ	.	''
DEP	NP	DEP	NP-SBJ	PP	NP	DEP	ROOT	DEP	DEP	NP	NP-SBJ	DEP	DEP	DEP	DEP	DEP	DEP	DEP	DEP	DEP	DEP	S	DEP	PP	ADJP	DEP	DEP
2	4	4	8	4	5	4	0	11	11	12	23	23	23	23	23	23	23	23	23	23	23	8	25	23	25	8	8

``	there	is	a	large	market	out	there	hungry	for	hybrid	seeds	,	''	he	said	.
``	EX	VBZ	DT	JJ	NN	IN	RB	JJ	IN	JJ	NNS	,	''	PRP	VBD	.
DEP	NP-SBJ	S	DEP	DEP	NP-PRD	PP	NP	ADJP	PP	DEP	NP	DEP	DEP	NP-SBJ	ROOT	DEP
16	3	16	6	6	3	6	7	6	9	12	10	16	16	16	0	16

mr.	robinson	of	delta	&	pine	,	the	seed	producer	in	scott	,	miss.	,	said	plant	genetic	's	success	in	creating	genetically	engineered	male	steriles	does	n't	automatically	mean	it	would	be	simple	to	create	hybrids	in	all	crops	.
NNP	NNP	IN	NNP	CC	NNP	,	DT	NN	NN	IN	NNP	,	NNP	,	VBD	NNP	NNP	POS	NN	IN	VBG	RB	VBN	NN	NNS	VBZ	RB	RB	VB	PRP	MD	VB	JJ	TO	VB	NNS	IN	DT	NNS	.
DEP	NP-SBJ	PP	DEP	DEP	NP	DEP	DEP	DEP	NP	PP	NP	DEP	NP	DEP	ROOT	DEP	DEP	NP	NP-SBJ	PP	S	DEP	ADJP	DEP	NP-OBJ	SBAR	DEP	ADVP	VP	NP-SBJ	SBAR	VP	ADJP	DEP	S	NP-OBJ	PP	DEP	NP	DEP
2	16	2	6	6	10	10	10	10	3	10	14	14	11	10	0	19	19	20	27	20	21	24	26	26	22	16	27	30	27	32	30	32	33	36	33	36	36	40	38	16

that	's	because	pollination	,	while	easy	in	corn	because	the	carrier	is	wind	,	is	more	complex	and	involves	insects	as	carriers	in	crops	such	as	cotton	.
DT	VBZ	RB	NN	,	IN	JJ	IN	NN	IN	DT	NN	VBZ	NN	,	VBZ	RBR	JJ	CC	VBZ	NNS